Typewriting machine



April 19, 1932. c. w. CRUMRINE TYPEWRITING MACHINE s Sheet-Sheet FiledMarch 5, 1951 i wwfi TN 3 Di INVENTOR CHESTER W. CRUMRINE WM ATTORNEYApril 19, 1932.

C. W. CRUMRINE TYPEWRITING MACHINE Filed March-5, 1951 3 Sheets-Sheet 2HI... 4 II... lffjiziik.

90. Ni 3mm wm mm 4N wm 3 4n INVENTOR CHESTER W.

CRUF'IRINE ON 9 Q ATTORNEY April 19, 1932. c. w. CRUMRINE TYPEWRITINGMACHINE Filed March 5, 1951 3 Sheets-Sheet 3 INVENTOR CHESTER W.CFLUMRINE g Zita J a ATTORNEY Patented Apr. 19, 1932 NITED MSTATESPATENT time crmsrm w. cnmmmor noenrsrnn," Yonx, ns srenon riannc'moznm'rrc mnwm'rnns, me, or nocmasrnn, new roux, a com on'a'rrouor imw 20m:

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Application fled larch a. 1031. Serial Io. man.

This invention relates to improvements in typewriting machines, andparticular-'1 to power driven typewriting machines in w ich the typeselection isor may be mechanically controlled by means of a perforatedmaster sheet. U

. The principal object of the invention isto rovide simple andinexpensive means for Ice g the controlling devices against actuationwhen the master sheet is not properly arranged in the machine. 1

Another objectof the invention is the provision of simple and eflicientmeans for preventing the insertion of the roller for the master sheetwhen the actuating devices for the roller are operatin In machines ofthisiind, the actuation of -the master sheetroller is usuall controlled'by a key or lever, and it is the o ject of th s ingmeans when eitherthe.roller, the master sheet, or the sheet guard are not in properposition in the machine, said means bemg also operative to prevent theinsertion of the master sheet roller when the control lever is inposition to connect the master sheet roller with its driving means.

To these and other ends, the invention consists in the construction andarrangement of parts that will appear from the following de" scriptionwhen read. in conjunction with the accompanyin drawings, the novelfeatures being pointe out in the claims at the'end'of a y forming proectlons 9 between them, which the specification.

In the drawings:

Fig. 1 is a transverse section through the. sheet controlled devices ofan automatically controlled typewriting machine illustrating onepossible embodiment of the invention, the sheet controlled devices beingdisconnect ed from their'driving means.

Fig. 2 is a similar view showing the position of the parts when themaster control sheet is removed;

Fi .3 is aview also similar as .lbut

showing the position of the parts w en the sheet guard is removed;

Fig. 4 is a similar viewshowing the position of the parts when the sheetcontrolled devices are connected" with their driving means and themaster sheet roller is removed; Fig. 5 is a detail pers ectiveview of ale ver or connecting an disconnecting the master sheet roller with itsdriving means;

Fig. 6 is a detail view inside elevation of a feeler which controls theinterlocking. de-

vices; v

gig. 7 is a similar view of a locking dog,

Fig. 8 is a similar view of an interlocking dofi.

eferring particularly to the drawmgs' -in i which like referencenumerals refer to the same part in all theviews, 1 representsa key leverof a writing machine having a key 2 and operatively connected withdevices for actuating type bars, of usual orwell known construction. Itwill be understood that a plurality of the key levers 1 are employed,one for each of the bars to be actuated.

Each of the key levers 1 is slidably connected 7 with the upper end of alink 3, the lower end of which is pivoted. to the rear end ofanactuating lever 4 pivoted at 5 to the-frame. The construction 1s suchthat when the key lever isdepressed, it slides on-the link withoutimparting any movement thereto. When,

however, a pull is exerted on the link, it op- V crates to depress theke lever. Revolub mounted on the forwar arm of the. lever 4 isa starwheel 6 arranged in juxtarelation to a power actuated master sheetroller 7. The roller'7 is provided with depressions 8 are'adapted toengage the arms of the star wheel to turn it-on' its lever, whereby thefront end of the lever is cammed away from the roller against thetension of a-s'pring 4' to depress its rear end to actuate the keylever.

with suitable perforations adapted to register with the arms of thestarwheels and arranged oncthe roller between it and the star" wheels.The construction is such that the star wheels ride on the master sheetuntil one of its perforations moves into registration with the arm of astar wheel and permits the arm to move through the sheet into 4engagement with one of the depressions in the roller and turns the starwheel :to actuatev control of the operator be provided for oper-.

atively connectin and disconnecting the master roller with its drivingmeans. i To this.

end, a stub shaft 12 is operatively connected to one end of the masterroller and has a worm wheel secured thereto which is operatively engagedby a worm on a shaft 13 ax ially alined with a driven shaft 14' havingaclutchmember 15 on its forward end. A

- cooperatin clutch member 16 is keyed to the rear end 0 the shaft 13 tomove into and out of engagement with the clutch member 15. A handactuated lever 17 is pivoted at 18 on a bracket fixed to the frame andis provided with a stud 19 which projects laterall therefrom and engagesa groove 20 provi ed therefor in the clutch member 16. Movement of thelever 17 from the position shown in Fig. 1 to that shown in Fig. 4serves to engage the clutch and operatively connect the worm withthedriven shaft. 14. Forward movement of the lever serves to disengage theclutch and again disconnect the master roller from its driving means.

At its lower end, the lever 17 is bent forwardly and downwardly to forman arm,

22, then laterally to form a connecting or locking arm 23 and againupwardly and rearwardly to form an arm 24 substantially parallel withthe arm 22 and also engaging the pivot 18 andlserves to revent anylateral thrust of the lever 17. rom an inspection of thedrawings, itwill be noted that the lever 17 is pivoted directly in rear of the powerdriven roller 7. Pivoted .on a bracket 25 forwardly of the lever 17, andto the rear of the ower driven roller is a feeler in the form a dog 26shown in detail in Fig. 6. Arranged beneath the roller 7 is a removableard 27 having front and rear walls over which the master sheet is guidedto and from the power driven roller. The rear wall 28 of the guard isslotted at 29 to provide a clearance for the forward or sensitive arm 30of the feeler. A spring 31 is connected to the feeler 26 at one end, andat its other end is anchored to the bracket 25 and serves to swing thefeeler resiliently into en agement with the'master sheet as shown in ig.1, or

through the slot 29 into en agement with the ro ler 7 when the sheet isa in Fig. 2. r v 3 The feeler 26 has a downwardly and rearsent, as shownwardly projecting arm 32 which engages a stud 33 projecting laterallyfrom a locking dog 34 pivotally mounted on the bracket 25 concentricwith the. feeler 26. A spring 35 connected at one end with the stud 33serves to resiliently swing the dog34 with its lug 33 resilientlyengaging the arm 32 on the feeler. The-locking dog 34 is shown in detailin Fig. 7, from an inspection of, which figure it will be seen to have acam locking surface 36 terminating in an abrupt shouldcr 37 at itsforward end. VVhen' the clutch is disengaged and there is no mastersheet on the roller 7 the feeler occupies the .position shown in Fig. 2,aspreviously explained,

under the action of its spring 31.' T hlS movement swings its arm 32downwardly and for-.

wardly from the position shown in Fig. 1 to that shown in Fig. 2, andermits the locking do 34 also to swing ownwai dly and forwar 1y underthe action of its spring 35 andmove itscam or locking surface 36 overand into engagement with the arm 23on the lever 17 and locks said leveragainst actuation in a direction to close the clutch. It will be notedfrom the above that unless the master sheet is in position on the masterroller, the lever 17 "is locked so that it cannotbe operated to engagethe clutch, since engage-g ment of the clutch at'this time might causeserious injury to the parts since all the type bars would be actuatedsimultaneously.

Before a new master sheet can" be inserted in the machine, it isnecessary to remove the guard 27, and before ,the guard is replaced, thefeeler again moves into engagement with the roller 7 and carries thenewly inserted v sheet'with it to the position shown in Fig. 3, in whichposition the parts again occupy substantially the same position as inFig. 2, and the locking dog 34 again engages the part 23 of the lever 17and prevents-actuation thereof to close the clutch.

As previously stated, the power driven roller 7 is disengaged from themachine when it is desired to place a new master sheet thereon. If theclutch be engaged at this time, the roller would be driven as soon asconnected with the machine and again the type bars would besimultaneously actuated with disastrous results if the roller wereinsorted without the sheet. It is therefore desirable to provide meansfor preventing the move to the position sho n in Fig. 4.' As

- of the dog. 4 The dog 40 is also carried forthe feelermoves forwarfrom the Fig. 1 position, its'movement is limited by the engagement ofits arm 32 with the rear surface of the arm 23 of the lever-17, whicharm is also engaged by the shoulder 37 on the dog 34 which also limitsthe forward movement ward with it until its rear or tail end swingsagainst the front face of the arm 23 under the action of the spring 35.This position of the parts is shown in Fig. 4, and it will be noted thatwhen the parts are in this position, the feeler' occupies the positionnormally occupied by the master roller, and that the engagement of thedo 40 on the feeler with the lever 17 locks t e feeler in thisposition'so that the roller cannot now be inserted in the machine.However, if the lever 17 be moved to disengage the clutch, its arm 23 ismoved downwardly and rearwardly out of the path of the dog 40, whichreleases the feler and permits it to be manually moved {out of the pathof the master sheet roller against the tension of its spring 31 so thatthe roller can be inserted in the machine."

Although only one embodiment of the invention is shown and describedherein, it will be understood that this application is intended to coversuch changes or modifications as come within the spirit of the inventionor scope of the following claims. a

I claim: v

1. In a typewriting machine, the combination of a frame, key levers andpower actuatedmeans for selectively operating said key levers, saidmeans comprising a source of power, a revoluble master sheet roller,manually actuated means 'for operatively connecting said master sheetroller with said source of power, means actuated by said master sheetroller for operating the key levers, a

master sheet for controllin g the operation of i the key levers, andmeans controlled by the resenc'e or absence of the master sheet forcontrolling the operation of said manually actuated means. a

2. In a typewriting machine, the combination of a frame, key levers andpower actuated means for selectively operating said key levers, saidmeans comprising a source of power, a revoluble master sheet roller,manually actuated means for operatively connect ing said-master sheetrollerwith said source of power, means actuated by said master sheetroller for operating the key levers, a

master sheet for controlling the operation of the key levers, lockingmeans for controllin the operation of said manually actuate means, and afeeler arran ed to resiliently engage the master sheet for controllingsaid locking means. a l

3. In a typewriting machine, the combination of a frame, key levers andpoweractuated means for selectively operating said key levers, saidmeans comprisin a source of power, a revoluble master s eet roller, amanually actuated lever for operatively connecting said master sheetroller with said source of power, means actuated b said master sheetroller for operating the key levers, a master sheet for controlling theoperation of the key levers, a dog movable into engagement with saidmanually actuated lever for locking said lever against actuation toconnect the master sheet roller with the source of power, and afeelerresiliently engaging the master sheet for controlling the movement'ofsaid dog.-

4. In a typewriting machine, the combination of a frame, key levers andpower actuated means for selectively operating said key levers, saidmeans comprising a source of power, a revoluble master sheet roller, a

manually actuated lever for operatively connecting said master sheetroller with said source of power, means actuated'by said masterasheetroller for operating the key levers, a master sheet for controlling theoperation of the'key levers, a dog movable into engagement with saidinanually actuated lever for locking said lever against actuation toconnect the master sheet roller with said source of power, a feelerresiliently engaging the master sheet, and resilient means In atypewriting machine, the combinalevers, a master sheet for controllingthe operation of the key levers, a locking device for locking saidmanually actuated lever against actuation to connect the master sheetroller with said source of power, a feeler resilient- 1y engaging themaster sheet for controlling the movement of said locking device, and a.

guard f0 I etaining the master sheet in the path of the feeler.

6. In a typewriting machine, the combination of a frame, key levers andpower actuated means for operating said key levers, said meanscomprising a source of power, a revoluble master sheet roller detachablymounted in the frame, manually actuated means for operatively connectingand dis-- connecting said master sheet roller with said source of power,means actuated by sa1d master sheet} roller for operating said key 1levers," a' fe eler automatically movable into a the path of the mastersheet roller when the i I latter is detached, and means controlled bysaid 1 manually actuated means for locking saidk eeler in the path of,the master sheet am; renal-z l 7 v .7.*'I atypewriting machine, thecombination ofa frame, key levers and power actuated Y means-foroperating said key levers, said means comprising a source of power, arevo= 15 luble master sheet roller detachably mounted in the frame,manually actuated means for operatively connecting and disconnecting csaid master sheet roller with said source of power, means actuated bysaid master sheet 20 roller foroperating said key levers, a feelerautomatically movable into the path of the master sheet roller when thelatter is detached, and a dog on said feeler adapted to en'gagesaidmanually actuated means when the latter is in position to connect themaster. sheet roller with the source of power to lock the feeler in thepath of the master roller. I

8. In a typewriting machine, the combination of a frame, key levers andpower actuated means for operating said key levers, said meanscomprising a. source of power, a revoluble master sheet rollerdetachably mounted in the frame, manually actuated means for a V I 85operatively connecting and disconnecting said master sheet roller withsaid source of power,

1 means actuated b \said master sheet roller for operating sai keylevers, a feeler, a resilient means formoving the feeler into the I.path of themaster sheet roller when the latter is detached, a lockingdog movably mounted on the feeler and adapted to engage said manuallyactuated means to lock thefeeler inthe path of the master'sheet roller,and resilient means for moving the dog to lockin'g position, thearrangement be- I 'ing'such that the dogmoves to locking po'si-- .jtionwhen the master sheet 'roller is detached [and the manually actuatedmeans is in posi- I 59 tion .to. connect the master sheet roller with fthe source of power, but is inoperative to ,I lock the feeler 'whenthemanually actuated means'is in 'osition to disconnect the master i sheetroller om thecsource of power.

I 66 In witness whereof I have hereunto signed I my name,

' CHES'I ER W, 'CRUMRINE.

